    <script>
      var request = $.ajax({
        url: "praxen.php",
        type: "GET",
        dataType: "html"
      });
      request.done( function( msg ) {
        $( "#list" ).html( msg );
      });

      $( "#btn_praxen" ).click( function( event ) {
        event.preventDefault();
        var request = $.ajax({
          url: "praxen.php",
          type: "GET",
          dataType: "html"
        });
        request.done( function( msg ) {
          $( "#list" ).html( msg );
        });
        request.fail( function( jqXHR, textStatus ) {
          alert( "Request failed: " + textStatus );
        });
      });
    </script>
